Improvement in pistons for force-pumps



' UNITED STATES PATENT OFFICE.

HENRY E. coolLEY, or BATTLE CREEK, MICHIGAN.

IMPROVEMENT IN Pls'roNs FOR FORGE-PUMPS.

Specification forming part of Letters Patent No. 36,702, dated October2l, 1862.

companying drawing, making a part of this specification, said drawingbeing a vertical central section of my invention.

This invention consists in constructing the piston with twowater-passages and a valvechamber, the latter being provided with aball-valve and communicating with a tubular piston-rod, all beingarranged in such a manner and in connection with the pump-cylinder,which is provided with suitable valves, so as to throw a continuousstream.

The object of the invention is to simplify and economize in theconstruction of forcepumps, and at the same time augment theirefficiency by a perfect working of parts, which will not be liable tobecome deranged by use. I

To enable those skilled in the art to fully understand and construct myinvention, I willV proceed to describe it.

A represents a cylinder, which is divided by partitions c into threecompartments, b, b', land c. The compartment c is at-the center of thecylinder, and is closed at its bottom, but communicates at its upper endwith the tubular piston-rod B, which is screwed into the upper end ofsaid compartment, as'

plainly shown in the drawing. The compartment c is the valvechamber,provided at two opposite points with openings d d', which are closedalternately by the valve C, the latter being spherical Vand sufficientlysmaller in diameter than the chamber c to admit of a free passage ofwater through c from one opening, d or d', when the other is closed. Theopening d forms a communication between the chamber c and thecompartment b, while the other opening, d', forms a communicationbetween c and the compartment b', the latter, b', communicating with thepumpcylinder at the bottom of cylinder A, and the former, b,communicating with the pump cylinder at the upper end -of cylinder A.The cylinder A is the piston, and it is fitted within the pumplcylinder,(shown in red, and designated by D,)'said cylinder being provided with avertical side water-passage, E, having a valve, F, opening upward in itsbottom, and communicating at its upper end with the upper end of thepumpcylinder D, as shown at e. rlhe bottom of the pump-cylinder D isalso provided with a valve, f, opening upward. The piston A is fittedwatertight in the pump-cylinder D, and is allowed to Work freely up anddown therein. W'hen the piston rises, a suction is of course formed inthe lower `part of the pumpcyliuder D, the valve f openingand the waterpassing through it, while the water in the pumpcylinder above the pistonA passes down through the compartment b, through opening d, into chamberc, and thence up through the tubularpiston-rod B. (Seeblack arrows.)When ythe piston descends, the valve f closes, and a suction is producedin the upper part of the pump-cylinder above the piston and in thewater-passage E, the valve F opening up-` ward,'aud the water passing up through E into the upper part of D. vThe spherical or ball valve C isoperated by the action of the water, the former closing the opening dand Vcutting off the communication between 'c and b as the pistonascends. and as the latter descends closing the opening d and cuttingoft the communication between c and b, space,

as previously alluded to, being allowed be-` tween the ball-valve C andthe opening which is not closed by the latter, to admit ofthe freepassage'of the water up through c into the tubular piston-rod B. Thus bythis simpleJ arrangement a very eticient forcepump is obtained, and onewhich is not 1iable to become deranged by use or to get out of repair.

I would remark that the lower horizontal partition, a, ou which thevalve G rests, is made detachable in any proper way to admit of theinsertion ofthe valve C in thechamber c, and its removal therefrom whennecessary.

I do not claim as new the pump-cylinder D,

ments, b b c, the latter, c, communicating I do claim as new and desireto secure by ranged to operate in connection with'a pump- LettersPatentcylinder provided with a. side Waterpassag The piston A, dividedinto three compartand suitable valves, as set forth. HENRY H. COOLEY.with b b by means of the openings d d,'and Witnesses: provided with theball-valve C, in combina- JOHN MEACHEM, tion with the tubular piston-rodB, all' ar- P. J. COOLEY.

